Simulation And Evaluation Method For Shock Resistant Of Typical Pipeline System

The shock resistance performance of shipboard pipeline system is very important tosurvivability of ship, so it is an exigent demand for simulation and evaluation method forshock resistant of typical pipeline system. Based on the time domain analysis method, asimulation method for shock resistant of typical pipeline system is introduced by nestingtechnique of local model and integrated model and FE method. Simulation precision of FEmethod is also verified from model test. On that basis, shock resistances of typical pipesegments of the pipeline systems are evaluated. The effects of pipeline design andinstallation factors on pipe shock resistance performance are studied. And some specificadvice is given. The main contents of this paper are listed as follows:(1) The paper established FE method of partial thinning mesh for typical componentsof pipeline. The integral finite element modeling technology is developed. On the basis ofFE method of partial thinning mesh for typical components of pipeline, according to FEmodeling technology with reasonable grid, the model of pipeline which boundary is set upby the characteristics of pipeline’s layout is established by the finite element softwareANSYS. Integral dynamic characteristic of typical pipeline system is obtained with highercalculating efficiency through FE method.(2) On the basis of the time domain analysis method and FE method analysistechnology, simulation method with high efficiency for shock resistance of typical pipelinesystem is established and simulation accuracy of the method is also verified from model test.Based on the time domain analysis method for shock resistance of pipeline system,simulation method with high efficiency for shock resistance of typical pipeline system isdeveloped by the treatments such as the equivalent boundary conditions, key parts ofrefinement, and weak joints of contact element. Typical spatial pipeline test model isdesigned and carried out in shock platform. The calculation precision of simulation methodis verified by the comparative analysis between test data and the numerical simulationresult.(3) Finite element analysis models of the pipeline segments are established. The threepipe’s shock resistance performance which contains transverse, longitudinal and vertical areevaluated. Weak link and improvement suggestions of shock resistance is given.(4) The main influential factors and the suggestions of improving shock resistance of pipeline system are given by numerical analysis. Taking the factors that affect shockresistance performance of pipeline system such as different way of piping system vibration,layout, support pattern, location, pipeline penetrating way, connecting method, numericalmodels into account, the pipes’ shock resistances performance which contains transverse,longitudinal and vertical are calculated. Then the main influential factors and thesuggestions for improving shock resistance of pipeline system are given.